Question
The average cost of 7 textbooks is $50.
After a textbook that costs $80 is removed,
  1. What is new total cost of all the remaining textbooks?
  2. What is new average cost of all the remaining textbooks?
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

The average cost of 7 textbooks is $50.
After a textbook that costs $80 is removed,
  1. What is new total cost of all the remaining textbooks?
  2. What is new average cost of all the remaining textbooks?